ipatests: ui_driver: convert run_cmd_on_ui_host to tasks.py::run_ssh_cmd
Paramiko is not compatible with FIPS.
Migrate run_cmd_on_ui_host to the OpenSSH CLI SSH(1) using
tasks.py's run_ssh_cmd.
Rationale: this is exactly what clients use.
Fixes: https://pagure.io/freeipa/issue/8129
Signed-off-by: François Cami <fcami@redhat.com>
Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>
Reviewed-By: Michal Polovka <mpolovka@redhat.com>